农村生活污水治理模式分析及资源化利用对策OA

The treatment of rural domestic sewage in Shandong Province was focused on,which was aimed at tackling prominent bottlenecks including homogenized conventional treatment models,high operation and maintenance(O&M)costs,and the poor stability of pollutant discharge compliance at small-scale sewage treatment stations.Technical support was offered for pollution prevention and control of small rural water bodies,agricultural non-point source pollution and overflow pollution in local areas.It was showed by field investigations that costly sewage collection tank and hauling systems were relied on by most villages.It was made difficult by deficiencies including rudimentary facility design,scattered sewage discharge sources and low influent pollutant concentrations for treatment stations with a daily capacity below 50 tons to sustain stable standard-compliant effluent.By comparing the pollutant removal performance and O&M expenditures of various sewage treatment processes,two integrated treatment frameworks were developed.The"collection tank+ecological treatment+resource recovery"model and the"biological treatment+ecological treatment+resource recovery"model,alongside a complete matching technical system for in-depth analysis.Both bio-ecological combined processes were featured with efficient pollutant elimination,low operational expenditure and streamlined daily O&M.The two proposed models were fitted well with the actual conditions of rural sewage governance across Shandong Province.O&M costs could be substantially cut and stable effluent quality could be guaranteed by them,and they were made suitable for large-scale promotion and application in the integrated remediation of regional rural aquatic environments.